Twist On Wire Connector, Color Yellow, For Conductor Material Copper, Maximum Operating Temperature 221 Degrees F, Maximum Voltage 600 V, Minimum Wire Combination (3) 20 AWG, Maximum Wire Combination (2) 12 AWG, Contact Material Steel, UL 94 Flammability Rating V-2, Maximum Conductors 5, Standards CSA Certified, UL Listed, Wire Connector Style Standard, Insulation Material Polypropylene, Maximum Single Wire Size 10 AWG, Minimum Single Wire Size 22 AWG, Overall Height 0.55 in